From bc76329d4a788b1c5f2de7208b2fae4e9204223c Mon Sep 17 00:00:00 2001 From: Bruce Allan Date: Fri, 17 Aug 2012 06:18:07 +0000 Subject: [PATCH] e1000e: cleanup strict checkpatch MEMORY_BARRIER checks Add comments to memory barriers per strict checkpatch. Signed-off-by: Bruce Allan Tested-by: Aaron Brown Signed-off-by: Jeff Kirsher --- drivers/net/ethernet/intel/e1000e/netdev.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/net/ethernet/intel/e1000e/netdev.c b/drivers/net/ethernet/intel/e1000e/netdev.c index 46c3b1f9ff89..fb6c813f5f86 100644 --- a/drivers/net/ethernet/intel/e1000e/netdev.c +++ b/drivers/net/ethernet/intel/e1000e/netdev.c @@ -3746,6 +3746,10 @@ static irqreturn_t e1000_intr_msi_test(int irq, void *data) e_dbg("icr is %08X\n", icr); if (icr & E1000_ICR_RXSEQ) { adapter->flags &= ~FLAG_MSI_TEST_FAILED; + /* + * Force memory writes to complete before acknowledging the + * interrupt is handled. + */ wmb(); } @@ -3787,6 +3791,10 @@ static int e1000_test_msi_interrupt(struct e1000_adapter *adapter) goto msi_test_failed; } + /* + * Force memory writes to complete before enabling and firing an + * interrupt. + */ wmb(); e1000_irq_enable(adapter); @@ -3798,7 +3806,7 @@ static int e1000_test_msi_interrupt(struct e1000_adapter *adapter) e1000_irq_disable(adapter); - rmb(); + rmb(); /* read flags after interrupt has been fired */ if (adapter->flags & FLAG_MSI_TEST_FAILED) { adapter->int_mode = E1000E_INT_MODE_LEGACY; -- 2.20.1